<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>学员管理系统—主页</title>
    <style>
        table{
            width: 1800px;
        }
        iframe{
            margin-left: 80px;
            margin-top: 15px;
            width: 1500px;
            height: 1000px;
        }
        a{
            text-decoration: none;
        }
    </style>
</head>
<body>
   <table cellspacing="0" cellpadding="0">
       <tr>
           <td valign="top">
               <ul>
                   <li>
                    <a href="user/list.html" target="ifram_name"> 用户管理
                    </a>
                   </li>
                   <li>讲师管理</li>
                   <li>学员管理</li>
                   <li>
                       <a href="login.html">
                           退出系统</a>

                   </li>
               </ul>
           </td>

          <td>
              <iframe name="ifram_name" src="default.html">
                  <!DOCTYPE html>
                  <html lang="en">
                  <head>
                      <meta charset="UTF-8">
                      <title>欢迎界面</title>
                  </head>
                  <body>
                  <img src="imgs/Wallpaper_1920x1080.jpg"  height="900px">
                  </body>
                  </html>
              </iframe>
          </td>
       </tr>

   </table>
</body>
</html>